Automatic beam-scale.



No. 785,209.-l PATENTBD MAR. 21, 1905.

G. HAMILTON.

AUTOMATIC BEAM SCALE.

APPLIOATION FILED JAN.11, 1904.

4 SHEETS-SHEET l` .llt-low( 0,1/3.

No. 785,209. PATENTED MAR. 2l, 1905.

G. HAMILTUN.

AUTOMATIC BEAM SCALE.

APPLICATION FILED JAN.11, 1904..`

4 SHEETS-SHEET 2.

ffl/ EN). M @d IVIZ..\"ESS ES.

/MWQM .E

No. 785,209. PATBNTED MAR. 21, 1905.

, G. HAMILTON.

AUTUMATIG BEAM SCALE.

APPLICATION FILED JAN. 11, 1904.

4 SHEETS-SEBBT 3.

lVITJVESSES.A V I WVEJVTUR.

PATENTED MAR. 2l, 1905.

G. HAMILTON'. AUTOMATIC BEAM SCALE.

APPLICATION FILED JAN.11, 1904.

4 SHEETS-SHEET 4.

IN V'E .N T 0 R.

WITJVESSES.

UNITED STATES Patented Mal-C11 2, 1905.

PATENT OEEICE.

GUY HAMILTON, OF DETROIT, MICHIGAN, ASSIGNOR TO THE CAILLE BROS.COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

AUTOMATIC BEAM-'SCALEu SPECIFICATION forming part of Letters Patent No.785,209, dated March 21, 1905.

y Application filed January l1, 1904. Serial No. 188,483.

Be it known that I, GUY HAMILTON, a citizen of the United States ofAmerica, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements in AutomaticBeam- Scales, of which the following is a specification, referencebeing' had therein to the accompanying drawings.

This invention relates to improvements in platform-scales of the classknown as beamscales; and .its object is to provide a scale of this classwith mechanism which will automatically operate when weight is put uponthe platform, to move the poise-block along' the beam to balance thescale and indicate the amount of weight, and also to provide otherpoise-weights and mechanism for automatically connecting' said weightswith the beam and disconnecting the same therefrom to increase the rangeof the scale.

It is also an object of the invention to provide mechanism whereby theoperation of 'the scale is controlled by a coin, so than when a coin isdropped in the scale will be automatically adjusted to a balance and theweight indicated without any further act by the operator; and a furtherobject is to provide eertain other new and useful features, all ashereinafter more fully described, reference being had to theaccompanying' drawings, in w hich Figure 1 is a vertical section throughthe upper part or head of the casing of a device embodying theinvention, showing the mechanism in side elevation. Fig. 2 consists ofenlarged details arranged in their proper relation to each other,showing in front elevation the coin holding and releasing mechanism, themechanism for holding and releasing the eounterweights, the means 'foroperating the coin-releasing mechanism and for raising the weights, andshowing the electrical circuits with the motor and clutch indicated.Fig. 3 is a detail of the supporting-plate for the hanging poise,showing the same in plan view. Fig. 4 is an enlarged detail showing themotor, clutch, sliding poise, and means connecting the same in frontelevation. Fig. is a detail of the same in side elevation.

Fig. 6 is a section on line .fn :u of Fig. 5 with parts broken away toshow the construction. Fig. 7 is a detail showing the coin holding andreleasing mechanism in side elevation. Fig. S is a section of the sameon the line 1/ 1/ of Fig. 2. Fig. 9 is a detail of thecounterweightoperating `mechanism, showing the same in section on theline .e of Fig. 2. Fig. IO is a detail showing an edge view of the meansfor providing a lost motion between the draft-rod and draft-bar and thelevers couneeting said rod and the operating-bar. Fig. I1 is a sectionaldetail of the coin-chute; Fig. I2, a section of said chute on the line'u c of Fig. I1, and Fig. I3 is a perspective view showing the exteriorof a complete device embodying the invention.

As shown in Fig. I3, the casing is designed to adapt the device 'for useas a penny-in-the slot machine, it consisting of a base portion A, fromthe rear of which rises a standard A/ of such height that the headportion A2 of the casing on the upper end of said standard will be in aconvenient position for the person standing upon the platform B to lookinto the casing-head through the glass front C, provided therein Theplatform B is supported in position on the base by any suitable leversystem, (not shown,) to which system the draft-rod I is attached at itslower end to be operated thereby and extends upward in the column orstandard A to the head to actuate the scale-beam 2. Said beam ispivotally supported near one end by links 1, engaging the knife-edgebearing 3 on the casing and a similar bearing-pin on the beam, andsupported on the casing at one end by a suitable knife-edge bearing at adistance below the scale-beam is a draft-bar 5, connected at itsopposite end to the short arm of the beam by links 6, engagingknife-edge pins on the beam and bar.

The draft-rod 1 is so attached to the draftbar that there is a lostmotion between the rod and barthat is, when weight is applied to theplatform B the rod will move downward a certain distance before the barwill be operated*and to secure this lost motion said bar is providedintermediate its ends with a poise.

knife-edgebearing pin 7, extending' through the bar and projecting'laterally from its sides, and the upper end of the draft-rod is providedwith slots or loops 8, through which the ends of said pin extend, saidloops extending' upward, one at each side of the bar. On the upper edg'eof the draft-bar are upwardly-extending' arms 9, forming points ofattachment for the springs 10, which are attached at their opposite endsto hooks on the draft-rod and operate to normally or when there is noweight on the platform hold the rod raised relative to the bar, with thepin 7 at the lower end of the loops 8, said spring's being' of liustsul'hcient strength to hold the rod in this position against the weightof the platform, te.

The lost motion of the draft-rod is utilized to actuate theoperating-bar 11, which is pivoted intermediate its ends to the easing,by pivoting' a lever 12 intermediate its ends to said rod to engage alever 13, similarly pivoted to the operating-bar, which levers arenormally held in a horizontal position to engage each other by springs14, attached to said levers near one of their ends and opel'- ating' tohold their opposite ends in contact with stops 15. rlhe lever 12 is soarranged that when its end engages the lever 13 upon the downwardmovement of the draft-rod its stop will prevent its turning' from itshori- Zontal position, and to prevent the lever 13 from so turning, sothat it will lirmly eng'age lever 12, and thus turn the operating-bar towhich it is attached, a hook 16 is pivoted to the lower edge of the barand hooks over the end of the lever 13. An arm on the hook 16 extendsbeneath the operating-bar into the path of lug's 17 on the casing, sothat as the bar is moved down the lower lug will eng'ag'e said arm anddisengag'e the hook from the lever 13 to release the same, which willturn on its pivot and allow the lever 12 to pass and the bar to turnback to its normal position, the lever 13 being' at once returned to itshorizontal position when the lever 12 has passed by its spring' 14. Theupper lug 17 eng'ages the arm of the hook on the upward or returnmovement of the bar and turns said hook into engagement with the level'again, said lug also forming a stop to limit the upward movement of theoperating-bar.

On the beam 2 is the sliding' poise 18, and to move said poise acarriage 19, adapted to slide upon a track-bar 20, supported in a horizontal position above the beam and at a distance therefrom, is providedhaving' two laterally and downwardly extending' arms 21 at each end,between the lower ends of which arms are pivotally secured the contactor push bars 22, having' pointed ends to eng'ag'e the 1n order thatthese push-bars may be very sensitive to any movement of the poise asthe beam vibrates and move freely therewith, their pivots are formed byproviding each with a transverse pivot-pin 23, having' pointed endsengaging' sockets in the arms at one side and similar sockets in theends of screws 24 screwed into openings in the arms at the other side.These contaet-barsare supported normally in a horizontal position bycoiled springs 25, attached to the free ends of said bars and to theblock, so that they will always be in position to engage the poise, yetfree to rise or fall with the movement of said poise as the beam moves.

The sliding` poise is made in two parts to embrace the beam, with achamber at the upper edge of the beam, within which are two rolls 26,engaging' the upper edge of the beam to support the poise so that itwill move freely, and to frictionally hold the poise in any position towhich it may be adjusted on the beam (see Fig. 4) a brake 27 is pivotedadjacent to one of the rolls to engag'e and prevent the same fromturning. A spring 26 normally holds the brake against the roll, and anarm 29 on the brake extends upward in a position to be engaged by thecontact-bar at that side of the poise, so that when the block 19 ismoved to move the poise said contact will engage the arm and turn thebrake out of eon tact with the roll to allow the poise to be movedfreely by said contact-bar.

The contact-bar at the opposite side of the poise when brought intoengagement therewith to move the same will engage a short lever 30,pivoted at one end to the poise and at its opposite end to aconnecting-bar connecting' it with the brake, so that said brake will bemoved to release the roll.

The carriag'e 19 is moved to adjust the poise 13 by an endlesssprocket-chain 31 passing' over idlers 32, located at a point a shortdistance beyond each end of the track-bar 2O and attached to a lugl onthe top of said carriage. Mounted in bearings on a frame 33 is arotatable shaft 34, to one end of which is secured a sprocket-wheel 35,engaging the sprocketchain 31, and loosely mounted to turn lreely onsaid shaft inside the frame are two electromag'netie coils 36, spacedapart, with a disk 37, of soft iron, between splined on the shaft toturn therewith, said disk, together with the coils, forming' anelectromagnetic clutch 38. 'Each coil 36 is provided with a gear 39,secured thereto, and on a counter-shaft 46, mounted in bearings on saidframe, is secured two pinions 41, one of which is in engag'ement withone of the gears 39 and the other with a double-width pinion 42 on ashaft 43, which double pinion is in mesh with the other gear 39, so thatmotion is transmitted from said counter-shaft to turn one gear and itscoil in one direction and through the pinion 42 to turn the other gearand its coil in the opposite direction, motion being' transmitted tosaid shaft 40 from a suitable electric motor 44 by a train of g'earing'.

That it may not be necessary to provide a very long scale-beam or morethan one of lOO llO

them in order that the range or' capacity of the scale may be sufficientfor the purpose for which it is designed, one or more counterweights orhanging poises is provided, said beam being provided with knife-edgepins 46, extending' through and laterally from the sides of said beamnear the outer end of the long arm thereof to project through the loops47 formed at the upper end of each i hanger of the weights, said loopsextending upward at each side of the beam. A longitudinally-movablesupporting table or member 48 is supported in any suitable manner by theeasing to freely move longitudinally, and through openings 49 in saidsupportingtable extend the hanger-rods of said weights, which rods areeach provided with a transverse pin 50 to engage the upper side of saidtable and hold the weights suspended in such a position that their loopswill be out of contact with the supporting-pins 46, thus permitting thebeam to move freely, said loops being longer than the limited distancewhich the pins travel with the vibration of the beam. The openings 49 inthe table are of sufficient width to allow the pins 50 to pass freelythrough, but said openings are formed with lateral extensions or slots51 of just sufficient width to receive the hanger-rods, so that whensaid weights are raised to bring their pins above the table and saidtable moved longitudinally the pins will engage the upper surface of thetable and support the weights.

On the lower end of the poise 18 is secured a forwardly-extending arm52, which when the poise is automatically run out on its beam to withina short distance of its extreme movement will engage the end of thesupporting'- table 48 and move the same longitudinally. One of thelateral slots 51 is longer than the other, and the weights are so spacedapart relative to said slot and openings that one of the weights will bedropped upon a slight movement of the table, and upon further movementthe other weight will be dropped.

To raise the weig'hts 45 from their suspended position on the beam to aheight where they may be engaged and supported by the table, a lifter 53is provided, having a guidestem 54 engaging bearings in a bracket on thecasing and sliding therein. r1`he operatingbar 11 is provided with aforked end 55 to embrace the stem 54 and engagesa pin extending throughsaid stem, so that when said bar is moved by the operator stepping onthe platform the lifter will be raised by said forked end. A coiledspring 56 is sleeved on the stem and operates to lower the lifter andalso to return the bar 11 to its normal position. The table 48 is movedlongitudinally in one direction by the poise 18, and to move the same inthe opposite direction a lever 57, pivoted at its lower end to thecasing and engaging a slot in the end of the table at its upper end, isprovided. The lifter 53 is formed with an incline 58 at one end, whichis engaged by a roll 59 on said lever 57, and a coiledspring 60 holdsthe roll firmly against said incline, which thus operates when thelifter is lowered to move the lever away from the table against theaction of said spring and to hold the same in that position until thelifter is raised. Then the lifter is raised, the lever is moved towardthe table bythe action of said spring, and if the table has beenpreviously moved toward the beam will engage said table and move it backto the position from which it was moved by the sliding poise. This levercannot, however, operate to move the table until the weights have beenraised to bring their pins 50 above the table, as part of the metal fromthe opening 49 is turned downward at each side of the inner end of theslots 51 to form downwardly-extending guides 61, which engage the pins5() as soon as the table is moved yby the arm 57 and prevent its furthermovement until the pins are raised up through the openings in the table.To prevent the weights from being swung laterally by the spring 60,acting through the lever, table, and guides upon the pins 50, stops 62are provided, extending outward from the side of the easing to near theopposite side of the weights. The hanger-rods of the weights are guidedat their upper ends when out of use or in their raised position byproviding extensions on the loops at one side of the beam formingguiderods 63 to engage the sockets 64, provided therefor.

65 is a coin-chute leading from a suitable slot in the casing andprovided with a section 66, consisting' of side portions 67, ofnon-conducting material. connected at one edge by a metal strip 68,provided with a binding-post 69, and between the opposite edges is ablock to which is secured a binding-post and one end of a fiat metalcontact-spring 71, said spring extending' downward and normally inwardfrom the edge of the chute, so that when a coin is dropped iu it willpass down the chute and wedge between said spring' and metal strip, thusmaking' an electrical connection between the two and closing thecircuits of which they form a part. hlounted adjacent to said section 66in a bearing on the chute and in any suitable supporting-frame is ashaft 72, upon which is loosely mounted a sleeve 73, to one end of whichis secured the ratchet-wheel 74 and to the opposite end the gear 75,provided with a pin 76, extending from its side to engage a pawl 77,carried by an arm on said contact-spring 71. Vhen the gear 75 is turnedin one direction, the pin 76 will engage the pawl 77 and flex thecontactspring, thus releasing the coin, a stop-pin 78 on the armpreventing the pawl from turning and allowing the pin to pass, while thepin will freely pass the pawl when the gear is turned in the oppositedirection.

Secured to the shaft 72 adjacent to the ratchet ICO IOS

IIO

74 is an arm 79, carrying a spring-pressed pawl 80 to engage the ratchetand turn the said ratchet and g'ear in one direction, and sleeved on theshaft is a coiled spring' 81, secured at one end to the gear and at itsopposite end to the frame in such a manner that when the gear is turnedby the pawl 8O said spring will be put under tension and tend to turnthe gear in the opposite direction. To hold said g'ear 75 from beingturned by the spring, a pinion 82, mounted on acounter-shaft 83, engageswith said gear, and on said shaft is secured a fan 84, one of the bladesof which is engaged by a dog 85, carried by the armature of a suitableelectromagnet 86. To turn the shaft 72 to wind up the spring' 81,apinion 87 is frictionally attached to the end of said shaft byproviding a nut on the end of said shaft and interposing a spring-washer88 between the nut and pinion, and a rack-bar 89 is held in engagementwith said pinion to turn the same by a grooved roll 90, the lower end ofsaid bar being attached to the end of the long arm of theoperating-lever 11 and operated thereby.

When weight is put upon the platform and the operatinglever operatedthereby, the rack-bar, which is normally held raised by said0perating-bar,will be pulled downward, bringing its teeth into Contactwith the pinion 87 and through the frictional resistance of the washer88 turning' the shaft and winding up the spring 81 through the medium ofthe arm 79, secured on the shaft, and the pawl 80, which engages theratchet to turn the gear 75, to one end of which the spring' is attachedas the shaft turns; but should said spring have already been wound up bya previous movement of the rack without having been released thefriction-washer will allow the pinion to turn without turning the shaft.When the fan 84 is released by the dog 85, the spring' 81 will unwind,turning the gear 75, which is retarded by the action of the fan, andsaid gear being connected to the shaft by the pawl and ratchet will turnthe shaft and its attached pinion, said shaft being free to rotate whenthe rack is in its raised or normal position, as its teeth are out ofengagement with the pinion, having' passed the same during the upwardmovement of the rack.

1n order that the operation of the various parts may be automaticallycontrolled by the coin, the contact-spring' 71 and strip 68 of thecoin-chute are in the circuits of the motor 44, the clutch 38, and theelectromagnet 86, as shown in Fig. 2, so that none of these devices willoperate unless a coin is placed in the chute to make the electricalconnection between the contact strip and spring and close the circuits.lt is also necessary in order that the mechanism may operateautomatically to show the correct weight of the person standing upon theplatform that the operation of the clutch and magnet be controlled bythe balancing of the scale-beam, as it is necessary to adjust thesliding poise back and forth (and throw the counterweights intooperative position, if required) until the beam balances, when themagnet 86 should operate to release the coin, and thus stop theoperation of all of the parts.

Extending inward from the end of the casing are two .supporting-arms 91,and the reduced and extended end of the scale-beam projects between saidarms, which form stops to limit its movement. Secured to each arm is acontact-point 92, and spring-contacts 93 are secured at one end toinsulating-blocks on said arms, with their free ends projecting' betweenthe points and beam and normally out of contact therewith. Thecontact-point on the arm above the beam is electrically connected by awire with one brush or terminal of one ol the coils of theelectromagnetic clutch, the other terminal of said coil being connectedto the binding-post 69 of the coin-chute, and the contact-springsupported by the same arm 91 is connected to the battery or other sourceof electrical energy, which battery is in turn connected to thebinding-post on the opposite side of the coin-chute. The contact pointand spring carried by the arm 91 below the beam are connected in asimilar circuit with the terminals of the other coil of the clutch, andtherefore each coil of the clutch is in a separate circuit, whichcircuits are no1'- mally open at two points-between the coutact-strip 68and spring 71 of the coin-chute and between the contact-points 92 andsprings 93.

Extending through openings provided with insulating-bushings in the arms91 are suitable movable contact-pins 94, each provided with heads ornuts near each end to limit their movement in the bushings and normallyheld toward the beam, which extendsbetwecn their inner ends, the pinabove the beam, by gravity, and the pin below the beam by a very lightcoiled spring sleeved thereon-` rlhe movement of the pins is such thatwhen the beam is exactly in balance, as shown in Fig. Q, both pins willbe in contact with the beam, which thus forms the connection between thetwo and closes the circuit; but if the scale is not in balance the endof the beam will be up or down from its mid-position between thesupporting-arms, and thus one of the pins will be forcedoutward by thebeam, which has moved away from the other pin, and the circuit will bebroken. One of these pins is connected with one terminal` of theelectromagnet 86, the other terminal of which is connected to thebinding-post 69 of the coin-chute, and the other pin is connected to thebattery, which in turn is connected to the other ybinding-post, 70, ofthe chute. The circuit of the electromagnet is therefore normally openat two points, and when a coin is dropped in, thus closing one of thebreaks, and the beam brought to a balance by the other mechanism thecircuit will be closed and the armature of the magnet will be drawndown, releasing the fan, which fan will operate to release the coin, andthus open all of the circuits. The motor is connected in a separatecircuit to said binding-posts, with the battery in the circuit, and whenthe coin is released the motor-circuit is opened, thus stopping themotor also.

When the operator steps upon the scaleplatform, the iirst movement ofthe draft-rod operates the bar 11, which in turn operates the rack-bar89 to wind up the spring' 81. The bar is then released by the hook 16,and the rack-bar is again lifted. The operator then drops a coin intothe chute, which at once operates to close the motor-circuit and set themotor in motion. The weight on the platform throws the scale-beam out ofbalance, its outer end moves up and pressing' the spring-contact 93 intocontact with the adjacent point 92 closes the circuit of one of thecoils of the clutch, thus sending' a current through the coil, whichcauses the clutch-disk 37 to be drawn firmly against said coil, which isbeing' constantly driven in one direction by the motor. As long' as thecurrent is maintained in the coil the clutch-disk will be driven by saidcoil and through the shaft 34 and its sprocket drive the sprocket-chainto move the sliding poise along the beam. The poise will be movedvoutward on the beam until the beam balances, when the circuit of theelectromagnet will` be closed by the contact of both pins 94 with thebeam and the magnet will operate to release the coin. lf the beam shouldvibrate between the arms, there will be an instant during each movementin which the circuit of said mag'net will be closed and the fan bereleased; but the fan would not have time to make more than ahalfrevolution, and as the g'ear carrying the pin 76 is many timeslarger than the gear on the fan-shaft the coin will not be released bysuch vibration.

When the Weight on the platform is toogreattobecounterbalancedbythesliding'poise, said poise will continue tobe run out on the beam until the arm 52 engages and moves thesupporting-table 48, when thelirst weight will be released, and if thisis not sufiicient to bring' the beam down the poise will continue to bemoved out and release the other weight. This will bring the beam down,opening the circuit controlling the clutch-coil and stopping the furtheroutward movement of the poise on the beam and at the same time closing'the circuit of the other coil of the clutch, which is continuously beingturned in the opposite direction, and thus the motion of thesprocket-wheel will be reversed and the poise move in on the beam untilsaid beam balances.

The poise and Weights will be left in the position to which they areadjusted to balance until the machine is again operated, when thestepping upon the platform by the next per- Limi son will operate thelever 11 and return the counterweights to position on theirsupporting-table.

Having' thus fully described my invention, what I claim is- 1. In ascale, the combination with a beam and a sliding poise on said beam, ofa counterweig'ht, a support for said counterweight, and means formoving' said poise and thereby releasing the weight to operate inconjunction with the poise.

2. In a scale, the combination with a beam and a sliding poise on saidbeam, of a counterweight normally held in an inoperative position, andmeans operating in relation to the movement of said poise for releasingthe weight to allow the same to operate.

3, ln ascale, the combination with the scalebeam, of a sliding' poise onsaid beam, a connterweight normally held in an inoperative position, andmeans controlled by the deflection of said beam for moving the poise andoperating', in relation to the position of the poise, to release thcweight.

4. ln a scale, the combination with the scalebeam, of a sliding poise onsaid beam, a counterwcight, and means for supporting said weight in aninoperative position adjacent to the end of the beam and adapted to bemoved by the poise to release the weight.

5. Ina scale, the combination with the scalebeam, of a series ofcounterweiglits, means for normally holding' said weights in aninoperative position and for releasing the same, one at a time, andmeans controlled by the position of the beam for operating the holdingmeans, whereby one or more of the weights will be released to operate,according to the number required to deflect the beam.

6. 1n ascale, the combination with the scalebeam, of a series ofcounterweights, means for supporting' said weights in an inoperativeposition adjacent to the end of said beam and for releasing' the same,one at a time, a sliding poise on said beam, and means controlled by thedeflection of the beam Jfor moving' the poise and operating in relationto the position of the poise to move the supporting means to release oneor more of the weights.

7. Ina scale, the combination with the scalebeam, of a counterweight, abearing-pin on the beam, an extended loop on the weight to receive saidpin, a table to support the weight with its loop out of engagement withthe pin to allow the beam to freely move and adapted to be moved torelease the weight, means for moving the table, and means for raisingthe weight to reng'age the table therewith.

8. ln a scale, the combination with the scalebeam, of counterweights,bearing-pins on the beam, hangers on the weights provided with extendedloops to receive the pins, a longitudinally-movable table provided withopenings having' lateral extensions through which the hangers pass,transverse pins on the hangers IOO to engage the upper side of thetable, means for moving the table longitudinal ly, and means for raisingthe weig'hts to reengage the transverse pins with the table.

9. In ascale, the combination with the scale* beam, of counterweights, asupporting-table for said weights formed with openings having lateralslots, guide-arms extending' downward from the edg'e of the opening's atthe side of the slots, hangers on the weights provided with extendedloops, bearing-pins on the beam extending' through said loops,transverse pins on the hangers, a vertically-movable lifter to eng'ag'ethe lower ends of the weights, means for raising' said lifter, a leveradapted to eng'age and move the table when the lifter is raised, and aspring to operate said lever.

10. In a beam-scale, the combination with the beam thereof, of asliding' poise consisting' of a block embracing' the beam, rolls on theblock eng'ag'ing' the upper edge of the beam, a brake-lever pivoted tothe bloek to eng'ag'e one of the rolls, a spring to hold the brake incontact with the roll, and levers adapted to be engag'ed to hold thebrake out of contact with the roll, and means for moving' said poiseprovided with push-bars to engage the levers for holding' the brake outof contact with the roll.

11. In a beam-scale, .the combination with the beam thereof, of asliding' poise on said beam, a stationary track-bar adjacent to thebeam, a carriag'e on said track, push-bars on said carriage pivoted tofreely move vertically and extending' horizontally toward the poise ateach side thereof to eng'age and move the same, means for supporting'said bars in a substantially horizontal position and means for moving'the carriage.

12. In a beam-scale, the combination with the beam thereof, of asliding' poise on said beam consisting of a block embracing' said beamand provided with a chamber, rolls pivotally secured within said chamberto engage the edge of the beam, a brakelever in said chamber, a spring'to hold the brake against one of the rolls, levers at each edg'e of thepoise connected to the brake to operate the same, a stationary trackadjacent to the beam, a carriage movable on said track, downwardlycm'vedarms on each end of said carriage, pushbars having' pointed ends andprovided with transverse bearing-mns to engage the arms, spring's tosupport said push-bars in a substantially horizontal position with theupper end of the poise between, and means 'for ineving' the carriage.

13. ln a scale, the combination with a beam and a sliding' poise on saidbeam, of a motorcircuit, an electric motor in said circuit for moving'said poise and means controlled by the balancing' of the beam forbreaking' the motor-circuit.

14. ln a scale, the combination with a beam and a sliding' poise onsaidbeam, of an electric ceases motor for moving' said poise, amotor-circuit, means for breaking' the motor-circuit, and meanscontrolled by the balancing' of the beam for releasing' the motorcircuitbreaking' means.

15. In a scale, the combination with a beam and a sliding poise on saidbeam, of an electric motor for moving' said poise, a motor-circuit,means for breaking' the motor-circuit, a circuit closed by thebalancing'of the beam, and means in the last-named circuit for releasing' themotor-circuit-breaking means.

16. In a scale, the combination with a beam and a sliding poise on saidbeam, of an electric motor for moving said poise, a motor-circuit, meansfor breaking the motor-circuit, a circuit closed by the balancing of thebeam, and an electromagnet in said circuit for releasing' said means.

17. In a scale, the combination with a beam anda sliding' poise on saidbeam, of an electric motor for actuating' the poise, a motor-circuit,means for breaking' the motor-circuit, an electromagnet for releasing'said means, an electromagnet-circuit, supports above and below the endof the beam and having' openings and contact-pins to which the terminalsof the mag'netcircuit are attached, said pins being' adapted to slide insaid opcning's and having' a limited movement therein, whereby thecontact-pins will both contact the beam and close the circuit onlywhenthe beam is in its balanced position.

18. ln a scale, the combination with automatic weighing mechanism and anelectric circuit governing the operation of said mechanism, ofcontactsin said circuit, means for moving' one of said contacts to breakthe circuit, an electromag'net to release said means, an electriccircuit for the magnet, and means whereby the balancing' of thc beamoperates to close the circuit of the magnet.

19. In a scale, the combination with automatic weighing mechanism and anelectric circuit g'overning the operation of said mechanism, of contactsin said circuit, a pawl carried by one of said contacts, a g'ear, a pinon said gear to engage the pawl and move the contact when the gear isturned in one direction, a coiled spring' to actuate said gear in onedirection, means for turning' the g'car to put a tension on the spring,a dog' to hold the gear from being' turned by the spring', anelectromagnet to operate the dog to release the gear, and an electriccircuit for said magnet closed by the balancing' of the weighing'mechanism.

20. In a scale, the combination with automatic weighing'mechanism and anelectric circuit governing' the opera-tion of said mechanism, ofcontacts in said circuit, a pawl on one contact, a gear, a pin on saidgear to engage the pawl, a coiled spring to actuate said gear in onedirection, a pawl and ratchet to actuate the gearin the oppositedirectionto wind the spring', means for operating said pawl and IoO ige

ratchet,A a shaft, a fan on said shaft, a pinion on the shaft inengagement with the said gear,

a dog to hold the fan and gear from turning i in one direction, anelectromagnet to operate said dog to release said gear and fan, acircuit for the magnet, and means operated by the weighing mechanism toclose the circuit when the mechanism comes to a balance.

21. In a scale, the combination with the beam and sliding poise on saidbeam, of an electric motor for actuating said poise, a motor-circuit,contacts in said circuit, a pawl ou one of the contacts, a gear, a pinon said gear to engage said pawl, a spring' to actuate said gear in onedirection, a rack and pinion to actuate the gearin the oppositedirection to wind the spring, a fan to retard the movement of said gear,a dog to hold said gear from being turned by the spring, anelectromagnet for releasing the dog, a normally open circuit for themagnet closed by the beam when it comes to a balance, a draft-rod toactuate the beam, means for providing' a limited movement of thedraft-rod independently of the beam, and means actuated by said movementof the rod for moving the rack.

22. In a scale, the combination with the beam, of a sliding poise onsaid beam, counter-weights normally supported out of operative contactwith the beam, an electromagnetic clutch for controlling the movement ofsaid poise and releasing said weights, an electric motor for rotating'the clutch, means for controlling' the clutch by the movement of thebeam, a motor-circuit, contacts in said circuit, spring-actuatedmechanism for moving one of the contacts to break the motor-circuit, arack-bar and pinion to wind said spring, a draft-rod to operate thescale-beam, an operating-bar connected to the draft-rod and operatedthereby and to which the rack-bar is connected, means for providing' alimited movement of the draft-rod independently of the beamand a lifterbeneath the weights operated by said operating-bar.

23. In a scale, the combination with ascalebeam, of a sliding poise onsaid beam, a motor, an electromagnetic clutch rotated by said motor, asprocket-chain to move the poise along the beam, a sprocket-wheelactuated through the clutch to engage the chain, contacts supportedadjacent to one end of the beam above the same, an electric circuitconnectingI said contacts and one coil of the clutch, contacts supportedadjacent to the end of the beam below the same, and an electric circuitconnecting the contacts below the beam with the other coil of theclutch.

Q4. In a scale, the combination with a scalebeam,ofaslidingpoiseonsaidbeam,asprocket chain connected to said poise to move the same, a shaft,a sprocket-wheel on said shaft to drive the sprocket-chain, twoelectromagnetic coils on said shaft spaced apart and free to betweensaid coils, a motor, means for transmitting motion from said motor toturn one of said coils in one direction and to turn the other coil inthe opposite direction, contacts supported above and below thescale-beam, and an electric circuit connecting the terminals of one ofthe coils with the contacts above the beam and a circuit connecting theterminals of the other coil with the contacts below the beam.

25. In a scale, the combination with a scalebeam, of a sliding poise onsaid beam, a track adjacent to said beam, a carriage on said trackadapted to engage and move the poise, idlers near each end of the track,a sprocket-chain secu red to the carriage and engaging the idlers, ashaft, a sprocket-wheel on said shaft engaging the chain to drive thesame, electromagnetic coils loosely mounted on said shaft and spacedapart thereon, a clutch-disk splined on the shaft between said coils,gears on the coils, a counter-shaft, pinions on said countershaft one ofwhich engages and drives the gear on one of the coils, an intermediatepinion to transmit motion from the other pinion to the gear on the othercoil, a motor, a train of gearing to transmit motion from the motor tothe counter-shaft, contacts supported above and below the beam adjacentto its end, an electric circuit connecting the contacts above the beamwith the terminals of one of the coils of the clutch, and a circuitconnecting the contacts below the beam with the terminals of the othercoil.

26. In a scale, the combination with the beam, of a sliding poise onsaid beam, counterweights normally supported adjacent to the end of saidbeam and out of contact therewith, means for moving the poise along thebeam and for moving the support to release the weights, means forcontrolling the poise-operating means, a draft-bar pivotall y supportedat one end, a link connecting the opposite end of said draft-bar withthe short arm of the scale-beam, a bearing-pin on the draft-barintermediate its ends, a draft-rod, loops on the upper end of thedraft-rod through which the bearing-pin extends, springs attached to thedraft-bar and draft-rod to hold the latter raised relative to theformer, an operatingbar pivoted intermediate its ends below thedraft-bar, a rack-bar attached at its lower end to one end of theoperating-bar, means operated by said rack-bar for operating thecontrolling means, a vertically-movable lifter to engage and raise thesaid weights and engaged and operated by the opposite end of theoperating-bar, a lever pivoted intermediate its ends to the draft-rod, asimilar lever pivoted intermediate its ends to the operating-bar withone end normally extending' beneath the adjacent end of the other lever,stops to limit the movement of said levers, springs for holding thelevers in engagement with the stops,

turn thereon, aclutch-disk splined on the shaft i a hook to engage andhold the lever on the IOO IIO

IIS

operating-bar against its stop, and a lug to engage and operate the hookto release said lever.

27. In ascale, the combination with a beam, a sliding poise on saidbeam, a track-bar supported adjacent to said beam, a carriage slidableon said track, pusher-bars pivotally secured to the carriage andsupported with the poise between their adjacent ends, an electromagneticclutch, a sprocket-wheel driven by said clutch, a sprocket-chain drivenby said wheel and secured to the carriage, an electric motor, a train ofgearing' to transmit motion from the motor to the clutch, amotor-circuit, contacts in said circuit, a pawl carried by saidspring-contact, a stop-pin for said pawl, a shaft supported in bearingsadjacent to the spring-contact, a sleeve on said shaft, a gear securedto one end of saidsleeve and a ratchetwheel secured to the opposite endthereof, a pin on the gear to engage the pawl, an arm secured on theshaft and carrying a springpawl to engage the ratchet, a pinionfrictionally secured to said shaft, a rack to engage said pinion, acounter-shaft, a pinion on said counter-shaft in engagement with saidg'ear, a fan on said counter-shaft, an electromagnet, a dog carried bythe armature of the magnet to engage the fan, a draft-bar provided witha bearing-pin, a draft-rod having' loops to engage said pin, anoperating-bar connected at one end to the said rack-bar and forked atits opposite end, means carried by the draft-rod for engaging andoperating the operating-bar, transverse bearing-pins on the beam nearone end, counter-weights provided with hangers having loops to receivesaid pins` guide-amis on said loops, guide-sockets to receive saidguide-arms, a supporting-table provided with openings having lateralextensions through which the hangers of the weights extend,

transverse pins on the hangers to engage the top of the table, a lifterprovided with a sleeve engaged and operated by the forked end of theoperating-bar, a spring sleeved on said stem, a lever to engage and movethe table operated by the lifter in one direction,.a spring to operatethe same in the opposite direction, a stationary arm above and astationary arm below the vibratory end of the beam, a contact-point oneach of said arms, a contactspring to engage each of said points, acircuit connecting the contact point and spring above the beam with onecoil of the clutch and with the binding-posts of the said contacts, acircuit connecting' the contact point and spring below the beam with theother coil of the clutch and with the binding-posts of the contacts, asliding contact-pin extending through cach of the arms above and belowthe beam and having a limited movement, and an electric circuitconnecting' the contact-pins with the electromagnet and with the bindingcontacts.

In testimony whereof l allix my signature in presence of two witnesses.

GUY HAMILTON. lVitnesses:

OTTO F. BAn'rimL, Lewis E. Vlfhnrrnlcns.

